Double check valve



FIG. 1 is a top perspective view of a valve according to a first embodiment of a valve in accordance with the present invention;

FIG. 2 is a left side view of the valve seen in FIG. 1;

FIG. 3 is a right side view of the valve seen in FIG. 1;

FIG. 4 is a bottom view of the valve seen in FIG. 1;

FIG. 5 is a front view of the valve seen in FIG. 1;

FIG. 6 is a top view of the valve seen in FIG. 1;

FIG. 7 is a rear view of the valve seen in FIG. 1;

FIG. 8 is a top perspective view of a second embodiment of a valve in accordance with the present invention;

FIG. 9 is a left side view of the valve seen in FIG. 8;

FIG. 10 is a right side view of the valve seen in FIG. 8;

FIG. 11 is a bottom view of the valve seen in FIG. 8;

FIG. 12 is a front view of the valve seen in FIG. 8;

FIG. 13 is a top view of the valve seen in FIG. 8; and,

FIG. 14 is a rear view of the valve seen in FIG. 8.

The words and numbers appearing on the valve do not form an essential part of the design, apart for their location. 

The ornamental design for a double check valve, as shown and described. 